CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash flows from operating activities:
Net income	$ 31,310	$ 34,531
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	4,949	4,457
Stock-based compensation	1,891	1,443
Provision for credit losses	1,769	5,697
Net amortization of premiums and accretion of discounts on securities and borrowings	5,737	4,785
Amortization of other intangible assets	1,603	1,958
(Gains) losses on securities transactions, net	(3,958)	157
Proceeds from sales of loans held for sale	453,881	119,894
Gains on sales of loans, net	(15,060)	(3,166)
Originations of loans held for sale	(453,643)	(107,451)
Losses (gains) on sales of assets, net	268	(32)
Change in FDIC loss-share receivable (excluding reimbursements)	3,175	90
Net change in:
Trading securities	30	(252)
Fair value of borrowings carried at fair value	2,172	1,240
Cash surrender value of bank owned life insurance	(1,341)	(1,959)
Accrued interest receivable	(1,799)	1,003
Other assets	31,769	119,438
Accrued expenses and other liabilities	(22,415)	(40,432)
Net cash provided by operating activities	40,338	141,401
Cash flows from investing activities:
Net loan originations	204,703	(176,974)
Loans purchased	(10,526)	(117,255)
Investment securities held to maturity:
Purchases	(111,347)	(52,358)
Maturities, calls and principal repayments	142,206	142,260
Investment securities available for sale:
Purchases	(192,809)	(49,012)
Sales	3,368	8,335
Maturities, calls and principal repayments	45,184	68,102
Death benefit proceeds from bank owned life insurance		1,689
Proceeds from sales of real estate property and equipment	984	3,276
Purchases of real estate property and equipment	(3,419)	(3,807)
(Payments to) reimbursements from the FDIC	(1,592)	4,372
Cash and cash equivalents acquired in acquisition		117,587
Net cash provided by (used in) investing activities	76,752	(53,785)
Cash flows from financing activities:
Net change in deposits	38,573	(96,211)
Net change in short-term borrowings	(7,063)	197,900
Repayments of long-term borrowings	(1,000)	(30,000)
Redemption of junior subordinated debentures		(10,000)
Dividends paid to common shareholders	(32,147)	(29,355)
Common stock issued, net	1,483	1,836
Net cash (used in) provided by financing activities	(154)	34,170
Net change in cash and cash equivalents	116,936	121,786
Cash and cash equivalents at beginning of year	853,100	379,049
Cash and cash equivalents at end of period	970,036	500,835
Supplemental disclosures of cash flow information:
Interest on deposits and borrowings	43,346	46,449
Federal and state income taxes	25	7,995
Supplemental schedule of non-cash investing activities:
Transfer of loans to other real estate owned	7,223	6,473
Non-cash assets acquired:
Investment securities available for sale		275,650
Loans		1,088,421
Premises and equipment, net		9,457
Accrued interest receivable		5,294
Goodwill		109,758
Other intangible assets, net		8,050
Other assets		72,137
Total non-cash assets acquired		1,568,767
Liabilities assumed:
Deposits		1,380,293
Short-term borrowings		29,000
Junior subordinated debentures issued to capital trusts		15,645
Other liabilities		52,998
Total liabilities assumed		1,477,936
Net non-cash assets acquired		90,831
Net cash and cash equivalents acquired in acquisition		117,587
Common stock issued in acquisition		$ 208,418